Richmond, Nowra, East Sale plus all the above available for Emergencies
The operative words being "
for emergencies." Short of a time-critical emergency, the RAAF and Navy would not be welcoming.
Where something really needs to be done is Perth. I suspect the LCNs at Pearce and Gin Gin are far too small to take a 777/747 without it causing a lot of damage to the runways and taxiways, so either of these fields could only be considered as a last ditch alternate in a very time-critical situation.
However, given the cost of fuel these days (and the cost of carrying it), the sums must surely add up by now to it being worthwhile for all the major users of Perth to throw in some money towards extending KAL by 500 metres and sticking in an ILS there. Learmonth and Adelaide are a very long way away, and I'd hate to think what it costs the users of Perth per annum to carry Adelaide as an alternate, as can sometimes be the case on days when the island destination option isn't do-able.